In the context of the Italian Quantum Weeks initiative, the exhibition "Dire l'indicibile" proposed a journey through the rules of Quantum Mechanics, offering a glimpse at the working principles and potential applications of quantum technologies (QTs).We devised a route to introduce the key concepts of quantum superposition, quantum measurements and evolution, and incompatible observables, by exploiting analogies based on custom-made models and tools.As examples of possible QT applications, we choose to discuss: i) the peculiarities of quantum walks (QW), as compared to classical random walks; ii) quantum cryptography and its applications.Two activities -illustrating the basis of QWs and of the BB84 quantum key distribution protocol-were actively performed by the public.The outcome of a satisfaction survey is extremely positive, encouraging us to explore this approach in different educational contexts.
In the context of the Italian Quantum Weeks initiative, the exhibition "Dire l'indicibile" proposed a journey through the rules of Quantum Mechanics, offering a glimpse at the working principles and potential applications of quantum technologies (QTs).We devised a route to introduce the key concepts of quantum superposition, quantum measurements and evolution, and incompatible observables, by exploiting analogies based on custom-made models and tools.As examples of possible QT applications, we choose to discuss: i) the peculiarities of quantum walks (QW), as compared to classical random walks; ii) quantum cryptography and its applications.Two activities -illustrating the basis of QWs and of the BB84 quantum key distribution protocol-were actively performed by the public.The outcome of a satisfaction survey is extremely positive, encouraging us to explore this approach in different educational contexts.
Quantum Physics is a cornerstone of modern science and technology, yet a comprehensive approach to integrating it into school curricula and communicating its foundations to policymakers, industrial stakeholders, and the general public has yet to be established. In this paper, we discuss the rationale for introducing entanglement and Bell’s Inequalities (BI) to a non-expert audience, and how these topics have been presented in the exhibition “Dire l’indicibile” (“Speaking the unspeakable”), as a part of the Italian Quantum Weeks project. Our approach meets the challenge of simplifying quantum concepts without sacrificing their core meaning, specifically avoiding the risks of oversimplification and inaccuracy. Through interactive activities, including a card game demonstration and the staging of CHSH experiments, participants explore the fundamental differences between classical and quantum probabilistic predictions. They gain insights into the significance of BI verification experiments and the implications of the 2022 Nobel Prize in Physics. Preliminary results from both informal and formal assessment sessions are encouraging, suggesting the effectiveness of this approach.
In recent years, the rapid development of quantum technologies and the increasing research activity in quantum science have prompted a growing number of dissemination initiatives aimed at enhancing public understanding of quantum physics (QP). Within the framework of the Italian Quantum Weeks project, we have developed, over the past four years, an exhibition that introduces visitors to fundamental concepts of QP through visual analogies, purpose-built hands-on demonstrators, and interactive staging activities. In this paper, we focus on the design, implementation, and educational use of two of these demonstrators, namely the quantum-dice and the quantum-cards. We also present preliminary visitor feedback, indicating that these low-tech interactive demonstrator materials can effectively engage a general audience, stimulate curiosity, and foster an understanding of abstract quantum concepts without requiring prior background knowledge.
This article aims to provide an introductory survey on quantum random walks. Starting from a physical effect to illustrate the main ideas we will introduce quantum random walks, review some of their properties and outline their striking differences to classical walks. We will touch upon both physical effects and computer science applications, introducing some of the main concepts and language of present day quantum information science in this context. We will mention recent developments in this new area and outline some open questions. 1. Overview Ever since the discovery of quantum mechanics people have been puzzled by the counter-intuitive character of the laws of nature. Over time we have learned to accept more and more effects that are unimaginable in a classical Newtonian world. Modern technology exploits quantum effects both to our benefit and detriment—among the memorable examples we should cite laser technology and not omit the atomic bomb. In recent years interest in quantum information theory has been generated by the prospect of employing its laws to design devices of surprising power [1]. New ideas include quantum cryptography [2, 3] and quantum computation. In 1994 Shor [4] discovered a quantum algorithm to factor numbers efficiently (that is in time that grows only polynomically with the length of the number to be factored). This has unleashed a wave of activity across a broad range of disciplines: physics, computer science, mathematics and engineering. This fruitful axis of research has uncovered many new effects that are strikingly different from their classical counterparts, both from the physical point of view as well as from a computer science and communication theory perspective. Over time these communities have gained a greater understanding of the concepts and notions of the other. The idea that information cannot be separated from
From the very beginning, Quantum Mechanics has been accompanied by crucial foundational questions: the possibility of visualizing physical processes, the limits of measurement epitomized by the Heisenberg uncertainty principle, the existence of a deeper underlying reality with additional degrees of freedom, the role of measurements, and the status of locality. Long regarded as philosophical speculations, these issues were progressively reformulated into precise mathematical statements and ultimately subjected to experimental verification. The trajectory proved unpredictable: questions once dismissed as metaphysical gave rise to experimental platforms, which in turn matured into devices and technologies powering quantum computation, communication, and sensing. Yet this development is not unidirectional: advances in technology also feed back into foundations, enabling tests of principles that were previously out of reach, for example, whether quantum superposition persists at larger and larger scales and whether reality, gravity included, is fundamentally quantum. In this way, the dialogue between foundational inquiry and technological progress continues to shape both our theoretical understanding and the practical realization of quantum phenomena.
The second Quantum revolution is expected to influence society as a whole thanks to the groundbreaking technologies it introduces. As part of its effort in the dissemination of Quantum Physics and Quantum Technologies, in November 2023, the National Institute of Optics (CNR-INO) in Florence organised ”Dire l’indicibile: l’entanglement quantistico” an exhibition open to the general public with the aim of spreading knowledge of quantum Physics and quantum technologies. The goal of the exhibition was to boost awareness of these developing technologies in local communities, using interactive exhibits designed for the occasion, while also investigating the impact this event had on its visitors.
Abstract Quantum technologies rely on superposition and entanglement, concepts that challenge classical physics and provide a rich context for teaching. In this paper, we report on a course for high school teachers that focused on quantum cryptography, one of the most mature quantum technologies. The course aims to provide teachers with an innovative approach to introducing quantum physics at the high-school level, showcasing quantum cryptography as a compelling example of how modern technology exploits fundamental principles of quantum theory. The course covers quantum mechanics, light polarization, and the BB84 quantum key distribution protocol through theoretical and experimental sessions by integrating formal and informal approaches exploiting lectures, online simulations (QuVis) and hands-on laboratory activities (using Thorlabs Quantum Cryptography Demonstration Kit). In addition, a card game, originally developed as a public outreach tool, was introduced to interactively perform the BB84 protocol. Feedback from teachers confirmed the feasibility of integrating these concepts into curricula to promote quantum literacy and engagement in secondary education.